Reorder your main PMU cartridge when the units left on the shelf reach the quantity you expect to use before the next delivery, plus your reserve. Build the purchase around your busiest configurations first. A dependable three-point liner that you use every week deserves a different stock target from a wider shader you open occasionally. This guide turns your appointment book into a simple reorder point and a practical choice between 10- and 20-cartridge packs.
Give your busiest configuration first place in the order
Your most useful stock list starts with the work you book. Hair strokes and refined borders call for a focused liner; a powder-brow schedule brings shading cartridges into the main rotation. Keep the exact configurations you prefer ready for those appointments, then add the specialist options your service mix also needs.
If you are establishing the range, start with a small number of purposeful choices. Pinky Pro 1R in 0.20 or 0.25 mm gives you a fine single-point option for hair strokes and contours. Pinky Pro 0803RL / 3RL / 0.25 mm is a useful grouped liner for defined detail. For local shading and colour-building, start with Pinky Pro 1003RS or 1005RS, choosing the smaller or broader round footprint to suit your work.
Once a configuration earns a regular place in your appointments, give it a core-stock target. Keep smaller quantities of the options you use less often. The PMU cartridge guide helps you choose complementary shapes before building that list.
Pinky Pro and Ultra combine 304 stainless steel needles, EO sterilisation, a silicone safety membrane and a transparent medical-grade PC housing. That gives your core and supporting configurations the same professional priorities: needle quality, a protective backflow barrier and a visible working tip. Choose Ultra when ATTO’s highest needle hardness and toughness is your priority; choose Pro for its wider configuration and packaging range.
Calculate the moment to replenish
Reorder point = expected use during the replenishment period + chosen reserve. The replenishment period runs from placing the order to receiving usable cartridges in the studio. Use the elapsed time from your completed orders as your starting record, then allow for the current delivery conditions. ATTO’s shipping policy and checkout show the relevant destination and delivery information.
Look at booked appointments and planned practice during that period. Your own record of cartridges opened per service turns those sessions into a demand estimate. Include practice use when it draws from the same stock: a training day belongs in the purchasing plan even when it brings no client appointments.
Here is a worked planning example for one Style. The quantities are example inputs, so you can replace them with your studio’s figures.
| Planning item | Example quantity | How it affects the decision |
|---|---|---|
| Expected use before replenishment | 18 cartridges | Your forecast for appointments and practice during the wait. |
| Chosen reserve | 6 cartridges | Additional stock for schedule changes or a longer wait. |
| Reorder point | 18 + 6 = 24 cartridges | Place the order when usable stock reaches this level. |
| Usable stock now | 20 cartridges | This Style is already at the point to replenish. |
Use sealed, in-date, undamaged cartridges in the available count. Record stock already allocated to upcoming work alongside it. This leaves you with one figure you can purchase from, rather than a drawer total that hides which configuration is running low.
Buy the quantity that keeps your main Style ready
The reorder point tells you when to act; your stock target tells you how much to buy. Set the target for the next period you want to cover, then subtract the stock already available and confirmed incoming units.
Purchase quantity = target stock − usable stock − confirmed incoming stock. If your target is 40 cartridges, you have 20 available and no incoming delivery, the purchase is 20. A 20-cartridge Pro pack fills that gap in one box. If the same target is 30, a 10-cartridge pack fills the ten-unit gap.
Choose 20 cartridges for a regular configuration when the additional supply fits your appointment plan. It keeps your main Style ready for more work and reduces how often you need to reorder it. Choose 10 cartridges for a new or occasional configuration, giving it a place in the kit before increasing the quantity. Pro also offers a 10-cartridge option with a finger sleeve; Ultra comes as 10 cartridges with a finger sleeve included.
The product selector shows current box and per-cartridge prices for the chosen configuration. Use those figures when comparing packs of the same Style. Combine genuinely needed items into an order after their quantities are clear, then review the delivered total at checkout. This keeps the purchase useful to your studio rather than letting a shipping threshold decide which stock you hold.
A short stock record makes the next order easier
One row per regular Style is enough: configuration, usable units, expected use, reserve, reorder point and confirmed incoming quantity. Add the order and receipt dates so your next replenishment estimate reflects the journey your deliveries actually took.
Before the next purchase, compare the plan with what happened. If a core Style ran low, identify whether appointments increased or delivery took longer and adjust that part of the calculation. If a specialist option barely moved, reduce its target. Your stock should follow the work you are doing now.
Start the next order with your main configuration: choose 1R for fine single-point work, RL for grouped detail or RS for local shading, then select the pack that meets your calculated quantity.
Common purchasing questions
Should I replenish every Style together?
Replenish the Styles that have reached their reorder point. You can combine them into one purchase, while keeping a separate target for the less-used configurations. That concentrates the order on stock you will use.
Which pack should I try first?
A 10-cartridge pack is a practical introduction to a new Pro configuration. Once it becomes a regular part of your work, choose the quantity needed for your appointment schedule; a 20-cartridge pack provides twice the supply in one purchase.
How much reserve should I keep?
Choose a reserve from the interruptions your studio needs to cover: extra appointments, practice sessions and the delivery variation in your order history. Review it after each replenishment cycle and increase or reduce it as your actual demand changes.